These unstudded all-season tyres from Metzeler have a diameter of 17". All-season tyres are convenient because you don't have to switch them out as the seasons change.
From Joom
Motorcycle tire Metzeler SPORTEC M9 RR 110/70HR17
Tirendo
Metzeler Sportec M9 RR ( 110/70 R17 TL 54H M/C, Front wheel )
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